02-20-2013, 03:39 PM
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Member
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Join Date: May 2007
Location: Mississauga
Posts: 1,319
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what he said
Quote:
Originally Posted by Aquattro
You simply need an air hole at the top of your plumbing. Don't restrict anything. Look up durso design, it shows how to use a hole with a valve. I don't use a valve myself, just have a small air hole in the top of the stacks (dual overflow pipes).
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I'm out. 
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